3D printing keeps on getting more interesting.
I have looked at the potential for 3D printing, or contour crafting, on a larger scale to deliver tangible benefits to the task of building expeditionary infrastructure but Andrey Rudenko has gone the whole hog and built a castle!
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http://www.totalkustom.com/3d-castle-completed.html
Not quite as quick as that Hesco-on-a-roll stuff you showed us a couple of years ago though? I’ve seen 3d-printing, it’s not quite as interesting as watching paint dry, especially as “can you guess what it is yet” wears off after the first 1/2 hour . . .